RK Racing (GB530GXW-130) Gold XW-Ring Chain with Connecting Link Sealed XW-Ring chain features heat treated hi-carbon alloy steel components with seamless rollers and shouldered bushings XW-Ring is made of an advanced nitrile butadiene composite featuring three contact lips and two convex outer stabilizers; this means three lubrication pools to protect against high speed abrasion, extreme heat build-up, torsional flex and loss of lubricant XW-Ring chains are the best high-speed, extreme heat performance chains available today The XW-Ring provides the user with a 50 percent longer wear life than basic O-ring chains GB530GXW is rated for use with up to 1400cc street bikes and has a tensile strength rated at 10,000 foot pounds